Windows Analysis Report
8TuwlFKxC5.dll

Overview

General Information

Sample name: 8TuwlFKxC5.dll
renamed because original name is a hash value
Original sample name: da6d952b6509ce400e9ea2098ba796f9.dll
Analysis ID: 1541899
MD5: da6d952b6509ce400e9ea2098ba796f9
SHA1: cce66c35c8e3028f296b7793cd4dbb0a9baafe19
SHA256: ad9513cf9a7f6a59bc7ed9a2bea44ec5e4bb655d18384336c0c124bfa2140286
Tags: 32dllexetrojan
Infos:

Detection

Score: 64
Range: 0 - 100
Whitelisted: false
Confidence: 100%

Signatures

Antivirus / Scanner detection for submitted sample
Multi AV Scanner detection for submitted file
AI detected suspicious sample
Sigma detected: Potential WinAPI Calls Via CommandLine
Contains functionality to call native functions
Contains functionality to check if a debugger is running (IsDebuggerPresent)
Contains functionality to dynamically determine API calls
Contains functionality to query CPU information (cpuid)
Contains functionality to read the PEB
Contains functionality which may be used to detect a debugger (GetProcessHeap)
Creates a process in suspended mode (likely to inject code)
Detected potential crypto function
Extensive use of GetProcAddress (often used to hide API calls)
Found evasive API chain (date check)
Found large amount of non-executed APIs
Program does not show much activity (idle)
Sample execution stops while process was sleeping (likely an evasion)
Uses 32bit PE files
Uses Microsoft's Enhanced Cryptographic Provider
Uses code obfuscation techniques (call, push, ret)

Classification

AV Detection
barindex
Antivirus / Scanner detection for submitted sample
Source: 8TuwlFKxC5.dll Avira: detected
Multi AV Scanner detection for submitted file
Source: 8TuwlFKxC5.dll ReversingLabs: Detection: 68%
AI detected suspicious sample
Source: Submited Sample Integrated Neural Analysis Model: Matched 98.5% probability
Uses Microsoft's Enhanced Cryptographic Provider
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_6E0C7B84 CryptStringToBinaryA,CryptStringToBinaryA, 3_2_6E0C7B84
Uses 32bit PE files
Source: 8TuwlFKxC5.dll Static PE information: EXECUTABLE_IMAGE, 32BIT_MACHINE, DLL
Source: 8TuwlFKxC5.dll Static PE information: DYNAMIC_BASE, NX_COMPAT
Contains functionality to call native functions
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_6E0B4DD0 NtUnloadDllMemoryAndExitThread, 3_2_6E0B4DD0
Detected potential crypto function
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_6E0CFE8F 3_2_6E0CFE8F
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_6E0CDED6 3_2_6E0CDED6
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_6E0D67FE 3_2_6E0D67FE
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_6E0CA2C0 3_2_6E0CA2C0
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_6E0D6350 3_2_6E0D6350
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_6E0C811F 3_2_6E0C811F
Uses 32bit PE files
Source: 8TuwlFKxC5.dll Static PE information: EXECUTABLE_IMAGE, 32BIT_MACHINE, DLL
Source: classification engine Classification label: mal64.winDLL@14/0@0/0
Source: C:\Windows\System32\conhost.exe Mutant created: \Sessions\1\BaseNamedObjects\Local\SM0:7104:120:WilError_03
Source: 8TuwlFKxC5.dll Static PE information: Section: .text IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ
Source: C:\Windows\System32\loaddll32.exe Key opened: HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiers Jump to behavior
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe C:\Users\user\Desktop\8TuwlFKxC5.dll,FreeLibraryMemoryAndExitThread
Source: 8TuwlFKxC5.dll ReversingLabs: Detection: 68%
Source: unknown Process created: C:\Windows\System32\loaddll32.exe loaddll32.exe "C:\Users\user\Desktop\8TuwlFKxC5.dll"
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\System32\conhost.exe C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\cmd.exe cmd.exe /C rundll32.exe "C:\Users\user\Desktop\8TuwlFKxC5.dll",#1
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe C:\Users\user\Desktop\8TuwlFKxC5.dll,FreeLibraryMemoryAndExitThread
Source: C:\Windows\SysWOW64\cmd.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe "C:\Users\user\Desktop\8TuwlFKxC5.dll",#1
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe C:\Users\user\Desktop\8TuwlFKxC5.dll,NtUnloadDllMemoryAndExitThread
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe "C:\Users\user\Desktop\8TuwlFKxC5.dll",FreeLibraryMemoryAndExitThread
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe "C:\Users\user\Desktop\8TuwlFKxC5.dll",NtUnloadDllMemoryAndExitThread
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\cmd.exe cmd.exe /C rundll32.exe "C:\Users\user\Desktop\8TuwlFKxC5.dll",#1 Jump to behavior
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe C:\Users\user\Desktop\8TuwlFKxC5.dll,FreeLibraryMemoryAndExitThread Jump to behavior
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe C:\Users\user\Desktop\8TuwlFKxC5.dll,NtUnloadDllMemoryAndExitThread Jump to behavior
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe "C:\Users\user\Desktop\8TuwlFKxC5.dll",FreeLibraryMemoryAndExitThread Jump to behavior
Source: C:\Windows\System32\loaddll32.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe "C:\Users\user\Desktop\8TuwlFKxC5.dll",NtUnloadDllMemoryAndExitThread Jump to behavior
Source: C:\Windows\SysWOW64\cmd.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe "C:\Users\user\Desktop\8TuwlFKxC5.dll",#1 Jump to behavior
Source: C:\Windows\System32\loaddll32.exe Section loaded: apphelp.dll Jump to behavior
Source: C:\Windows\System32\loaddll32.exe Section loaded: cryptbase.dll Jump to behavior
Source: C:\Windows\System32\loaddll32.exe Section loaded: msasn1.dll Jump to behavior
Source: C:\Windows\System32\loaddll32.exe Section loaded: kernel.appcore.dll Jump to behavior
Source: C:\Windows\SysWOW64\cmd.exe Section loaded: apphelp.dll Jump to behavior
Source: 8TuwlFKxC5.dll Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_IMPORT
Source: 8TuwlFKxC5.dll Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_RESOURCE
Source: 8TuwlFKxC5.dll Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_BASERELOC
Source: 8TuwlFKxC5.dll Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_DEBUG
Source: 8TuwlFKxC5.dll Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG
Source: 8TuwlFKxC5.dll Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_IAT
Source: 8TuwlFKxC5.dll Static PE information: DYNAMIC_BASE, NX_COMPAT
Source: 8TuwlFKxC5.dll Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_DEBUG
Source: 8TuwlFKxC5.dll Static PE information: Data directory: IMAGE_DIRECTORY_ENTRY_IMPORT is in: .rdata
Source: 8TuwlFKxC5.dll Static PE information: Data directory: IMAGE_DIRECTORY_ENTRY_RESOURCE is in: .rsrc
Source: 8TuwlFKxC5.dll Static PE information: Data directory: IMAGE_DIRECTORY_ENTRY_BASERELOC is in: .reloc
Source: 8TuwlFKxC5.dll Static PE information: Data directory: IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG is in: .rdata
Source: 8TuwlFKxC5.dll Static PE information: Data directory: IMAGE_DIRECTORY_ENTRY_IAT is in: .rdata
Contains functionality to dynamically determine API calls
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_6E0C7868 LoadLibraryW,LoadLibraryW,LoadLibraryW,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress, 3_2_6E0C7868
Uses code obfuscation techniques (call, push, ret)
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_6E0C9A06 push ecx; ret 3_2_6E0C9A19
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_6E0C8BC5 push ecx; ret 3_2_6E0C8BD8
Extensive use of GetProcAddress (often used to hide API calls)
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_6E0C811F std::_Xinvalid_argument,GetModuleHandleW,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress, 3_2_6E0C811F
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\SysWOW64\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Found evasive API chain (date check)
Source: C:\Windows\SysWOW64\rundll32.exe Evasive API call chain: GetSystemTimeAsFileTime,DecisionNodes
Found large amount of non-executed APIs
Source: C:\Windows\SysWOW64\rundll32.exe API coverage: 7.6 %
Program does not show much activity (idle)
Source: all processes Thread injection, dropped files, key value created, disk infection and DNS query: no activity detected
Sample execution stops while process was sleeping (likely an evasion)
Source: C:\Windows\System32\conhost.exe Last function: Thread delayed
Source: C:\Windows\System32\loaddll32.exe Thread delayed: delay time: 120000 Jump to behavior
Contains functionality to check if a debugger is running (IsDebuggerPresent)
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_6E0C9841 IsProcessorFeaturePresent,IsDebuggerPresent,SetUnhandledExceptionFilter,UnhandledExceptionFilter, 3_2_6E0C9841
Contains functionality to dynamically determine API calls
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_6E0C7868 LoadLibraryW,LoadLibraryW,LoadLibraryW,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress,GetProcAddress, 3_2_6E0C7868
Contains functionality to read the PEB
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_6E0D05B1 mov eax, dword ptr fs:[00000030h] 3_2_6E0D05B1
Contains functionality which may be used to detect a debugger (GetProcessHeap)
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_6E0D375D GetProcessHeap, 3_2_6E0D375D
Program does not show much activity (idle)
Source: all processes Thread injection, dropped files, key value created, disk infection and DNS query: no activity detected
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_6E0C9841 IsProcessorFeaturePresent,IsDebuggerPresent,SetUnhandledExceptionFilter,UnhandledExceptionFilter, 3_2_6E0C9841
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_6E0C9609 SetUnhandledExceptionFilter,UnhandledExceptionFilter,GetCurrentProcess,TerminateProcess, 3_2_6E0C9609
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_6E0D1283 IsDebuggerPresent,SetUnhandledExceptionFilter,UnhandledExceptionFilter, 3_2_6E0D1283
Creates a process in suspended mode (likely to inject code)
Source: C:\Windows\SysWOW64\cmd.exe Process created: C:\Windows\SysWOW64\rundll32.exe rundll32.exe "C:\Users\user\Desktop\8TuwlFKxC5.dll",#1 Jump to behavior
Contains functionality to query CPU information (cpuid)
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_6E0C9A1B cpuid 3_2_6E0C9A1B
Source: C:\Windows\SysWOW64\rundll32.exe Code function: 3_2_6E0C9764 GetSystemTimeAsFileTime,GetCurrentThreadId,GetCurrentProcessId,QueryPerformanceCounter, 3_2_6E0C9764
windows-stand
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Legend:

  • Process
  • Signature
  • Created File
  • DNS/IP Info
  • Is Dropped
  • Is Windows Process
  • Number of created Registry Values
  • Number of created Files
  • Visual Basic
  • Delphi
  • Java
  • .Net C# or VB.NET
  • C, C++ or other language
  • Is malicious
  • Internet
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1541899 Sample: 8TuwlFKxC5.dll Startdate: 25/10/2024 Architecture: WINDOWS Score: 64 19 Antivirus / Scanner detection for submitted sample 2->19 21 Multi AV Scanner detection for submitted file 2->21 23 AI detected suspicious sample 2->23 25 Sigma detected: Potential WinAPI Calls Via CommandLine 2->25 7 loaddll32.exe 1 2->7         started        process3 process4 9 cmd.exe 1 7->9         started        11 conhost.exe 7->11         started        13 rundll32.exe 7->13         started        15 3 other processes 7->15 process5 17 rundll32.exe 9->17         started       
⊘No contacted IP infos